package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.Servlet;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;

    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)) {
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnoverList=new ArrayList<>();
        for(LocalDate date:dateList){
            //查询date日期对应的已完成的订单的营业额数据
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date,LocalTime.MAX);

            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);
            turnover = turnover==null? 0.0:turnover;
            turnoverList.add(turnover);
        }

        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)) {
            begin=begin.plusDays(1);
            dateList.add(begin);
        }



        List<Integer> newUserList=new ArrayList<>();
        List<Integer> totalUserList=new ArrayList<>();


        for (LocalDate date:dateList){
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date,LocalTime.MAX);

            Map map=new HashMap();
            map.put("end",endTime);

            Integer totalUser =userMapper.countByMap(map);

            map.put("begin",beginTime);
            Integer newUser =userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }

    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)) {
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> orderCountList=new ArrayList<>();
        List<Integer> validOrderCountList=new ArrayList<>();
        for(LocalDate date:dateList){
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date,LocalTime.MAX);
            Integer orderCount=getOrderCount(beginTime,endTime,null);

            Integer validOrderCount=getOrderCount(beginTime,endTime,Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }

        Integer totalOrderCount=orderCountList.stream().reduce(Integer::sum).get();

        Integer validOrderCount=validOrderCountList.stream().reduce(Integer::sum).get();

        Double orderCompletionRate =0.0;
        if(totalOrderCount!=0){
            orderCompletionRate=validOrderCount.doubleValue()/totalOrderCount;
        }

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {

        LocalDateTime beginTime=LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime=LocalDateTime.of(end,LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 =orderMapper.getSalesTop10(beginTime,endTime);
        List<String> names =salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList =StringUtils.join(names,",");

        List<Integer> numbers =salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList =StringUtils.join(numbers,",");
        return SalesTop10ReportVO.builder().nameList(nameList).numberList(numberList).build();
    }

    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map =new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);

        return orderMapper.countByMap(map);
    }

    public void exportBusinessData(HttpServletResponse response) {
        LocalDate dateBegin =LocalDate.now().minusDays(30);
        LocalDate dateEnd =LocalDate.now().minusDays(1);


        BusinessDataVO businessDataVO=workspaceService.getBusinessData(LocalDateTime.of(dateBegin,LocalTime.MIN),LocalDateTime.of(dateEnd,LocalTime.MAX));

        InputStream in=this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板");

        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);

            XSSFSheet sheet = excel.getSheet("Sheet1");

            sheet.getRow(1).getCell(1).setCellValue("时间："+dateBegin+"至："+dateEnd);

            XSSFRow row =sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            row=sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            for(int i=0;i<30;i++){
                LocalDate date=dateBegin.plusDays(i);
                BusinessDataVO businessData=workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN),LocalDateTime.of(date,LocalTime.MAX));

                row= sheet.getRow(7+i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            ServletOutputStream out=response.getOutputStream();
            excel.write(out);

            out.close();
            excel.close();
        }
        catch (IOException e) {
            throw new RuntimeException(e);
        }

    }
}
